A truck cap having a cap body with an opening, and a cap door that is movable between open and closed positions with respect to the opening. At least one hinge that attaches to the cap body and the cap door of the truck cap. The hinge includes a first hinge bracket member and a second hinge bracket member. The first hinge bracket member includes a hinge bracket to receive a pivot pin. The second hinge bracket member includes a hinge bracket with an opening sized to receive at least a portion of the pivot pin. The first hinge bracket member and the second hinge bracket member are pivotable with respect to each other about the pivot pin. A longitudinally extending gas prop pivotably attached to the pin extending from the second angled portion of the first hinge bracket member and to the pin of the second hinge bracket member.